I’ve found this youtube series on Lyra, that enables true first person, including a FPS mesh (visible to player), while the 3rd person mesh stays visible for other players… Also, it has procedural aim down sight…
Though, beware… I’m able to get it working in UE5.1, until the Animation BP… Still figuring out how to deal with it… The Anim Linked Layers, ain’t working flawless for me… But it should work perfectly in UE 5.0.x